No way to use large font in forums

Since [font size="7"]the[/font] [style size="7"]latest[/style] changes [font size="20px"]I've[/font] [style size="20px"]been[/style] unable to change the size of text, even using the forum extender script. Any ideas?

Transcribed message: Since the latest changes I've been unable to change the size of text, even using the forum extender script. Any ideas?​​